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Point Cloud Clearance Checks for Equipment Replacement
Equipment replacement involves three questions: will the unit fit, can it reach its location, and will there be room to service it? A registered point cloud provides the measured site reference for those checks. Compare the full equipment envelope with captured obstructions, then account for the required working space, movement and measurement allowances.
Our Approach
How we help your team
Before replacement equipment arrives, your team needs to understand the tight spots along its route and at its final location. We focus scanning on the surfaces your engineers and installers need to evaluate fit, movement and service access.
We plan capture around the doorways, overhead services, equipment and connection points that could constrain your installation. Our team registers and reviews the scans, then provides the agreed point cloud or modeled reference with coverage limitations identified. Your engineers and installers can use that information to evaluate their equipment dimensions, movement plan and required clearances.
Part 1 of 7
Define the decision and the equipment envelope
Start with the decision the team needs to make: whether a replacement unit fits its final location, whether it can reach that location, or whether it can be operated and maintained there. Obtain current manufacturer dimensions and the proposed installation arrangement. Identify handles, lifting points, insulation, connections and other projections that may extend beyond the nominal casing.
Record the equipment drawing revision and the configuration being evaluated. A shipping assembly on skids can have a different envelope from the installed unit. An access panel may need space beyond the closed cabinet. The scanning scope should capture the surfaces relevant to those conditions, including the underside of obstructions and the sides of constrained passages.
Part 2 of 7
Separate static fit, movement and maintenance space
A static fit check compares geometry at one proposed position. A movement check examines the occupied space as the unit translates or rotates along a route. A maintenance check considers access such as opening doors, removing filters or withdrawing components. These checks can share reference data but should have distinct requirements and results.
Autodesk distinguishes hard clashes, where geometry intersects, from clearance tests, which report geometry within a specified distance. Navisworks also supports movement-based checking through animation. A static clearance test does not automatically evaluate the swept path of a turning or tilted load; that movement must be represented and reviewed in the selected workflow.
Part 3 of 7
Confirm coordinates, coverage and the surfaces tested
Place the equipment representation and registered cloud in the agreed coordinate system, then verify reference locations and units. Inspect the route in sections and three-dimensional views. Check for scan shadows beneath services, missing door heads, reflective surfaces and changes made after capture. An empty patch of point cloud can mean missing evidence rather than available space.
If using Navisworks for a model-to-cloud test, select the intended surfaces and laser points explicitly. Autodesk notes that a hard test requires intersections with points, which can miss a close approach between sampled observations. Configure the appropriate clearance test and sampling review for the task, and inspect critical locations rather than relying on a zero-clash total alone.
Part 4 of 7
Agree the clearance requirement and allowance basis
The required gap should come from the equipment, design and installation requirements applicable to that location. Define how measurement uncertainty, model representation, equipment dimensional variation and positioning or movement will be treated. An instrument’s published accuracy is only one input to that discussion; it is not the complete clearance allowance.
Agree how the team will judge a tight fit before reviewing the results. Keep required working space separate from allowances for measurement and movement, and avoid counting the same allowance twice. If the project needs a statistical uncertainty calculation, document that method. The example below uses a combined planning allowance to demonstrate the calculation; an actual project needs its own justified values.
Part 5 of 7
Work through one overhead clearance section
This illustrative example checks one vertical section of a level transport route. All values are hypothetical and use the same local floor reference. Assume that the agreed transport envelope includes the unit, skids and projections, and that the lowest relevant overhead surface is sufficiently captured. The project team has specified a 60 mm working gap and a separate 25 mm combined allowance.
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| Quantity | Example value or calculation |
|---|---|
| Measured overhead height above the reference floor | 2,420 mm |
| Transport envelope height above the same reference | 2,320 mm |
| Nominal available gap | 2,420 − 2,320 = 100 mm |
| Example required working gap | 60 mm |
| Example combined allowance | 25 mm |
| Remaining margin under these assumptions | 100 − 60 − 25 = 15 mm |
Part 6 of 7
Interpret the margin and record unresolved conditions
The example leaves a positive 15 mm margin at the inspected section under its stated assumptions. It does not prove that the whole route is clear. A floor ramp, a tilted load, another projection or an unscanned obstruction can change the result. If the same example envelope becomes 20 mm taller, its remaining margin becomes −5 mm and no longer satisfies the assumed requirement.
Keep a section or viewpoint for each tight location, together with the measured gap, equipment revision, required clearance and allowances. Mark whether the location passes the agreed check, needs a change or requires more information. A crew planning the move should be able to find the limiting obstruction and understand which equipment configuration was assessed.
Part 7 of 7
Verify the final arrangement before installation
Check the complete route and final position against the current equipment and movement plan. Confirm that the site still matches the captured conditions and that temporary works, rigging and removable obstructions have been addressed by the responsible team. Recheck critical dimensions where the available margin and consequence of interference justify additional field verification.
Issue the scan reference, model revisions and clearance record together. Keep unresolved areas visible to the people planning the work. The point cloud study provides geometric evidence for the decision; the responsible design, equipment and installation teams determine the applicable requirements and authorize the final method of installation.
- Identify the current equipment configuration and the complete route being evaluated.
- Record scan date, reference coordinates and areas that could not be verified.
- Separate final fit, transport and maintenance requirements in the issue record.
- Resolve critical unknowns and changed conditions before relying on the result.
Resolve the tightest locations before the equipment arrives. Share the drawings for the replacement unit and proposed route with our team so we can scope capture around the surfaces your engineers and installers need to assess, with gaps in coverage identified for follow-up.